Jeu 1 :

Mes solutions :

653 = 50+9×(75+1−(5+4))
653 = 5+9×(75+1−4)
653 = 50+(5+4)×(75+1−9)
653 = 9+(50−4)×(75/5−1)
653 = (9+4)×(50+5+1)−75
653 = 9+5×(75+50+4)−1